January

2012

 * January 21, 2012 - Maiden Casey is introduced
 * January 26, 2012 - Takahashi Fumiko is introduced

2010

 * January 00, 2010 - Alguin's are introduced
 * January 21, 2010 - Kageito is introduced

2009

 * January 06, 2009 - Lulu Megurine is introduced
 * January 08, 2009 - Tako Luka is introduced

2008

 * January 00, 2008 - Concepts of Fanon!Lola appear
 * January 07, 2008 - Lexn Negamine is introduced
 * January 18, 2008 - The Hagane Vocaloid series is introduced with the creation of Hagane Miku
 * January 22, 2008 - Primina is introduced

Misc

 * January 12, 0000 - Birthdate of Toki Fuyone
 * January 30, 0000 - Birthdate of Okamine Yuki